INVESTIGATION OF RHO-0(770) MESON SPIN ALIGNMENT IN (P)BARP INTERACTIONS AT 32 GEV C/

The spin alignment of rho0(770) mesons has been investigated in ppBAR interactions at 32 GeV/c. The statistics of 250 K ppBAR collisions was obtained with the help of the liquid hydrogen bubble chamber ''Mirabe lle''. Various reference frames have been used in the analysis and the most profound effect has been revealed in the transversity frame. The measured value of the spin density matrix element rho00 amounts to 0. 447 +/- 0.033. The Absolute value of x - and p(t)2-dependences of rho( 00) have been studied and a strong increase of rho(00) has been detect ed in regions of enlarged Absolute value of x and p(t)2. It is shown t hat the spin alignment of rho0(770) takes place in both annihilation a nd nonannihilation channels. In addition, a sizable spin alignment of f2(1270) mesons in the Gottfried-Jackson frame has been found in the f ragmentation region Absolute value of x > 0.4.